Guys,
I'm not a Dr. but, having been diagnosed with Prostate Cancer in the last year I have done a lot of reading and this sounds like enlarged prostate. The waste is pushing on the prostate and forcing the seminal fluid out (like prostate milking).
I would suggest that you see a Urologist and make sure that you have your PSA level checked. This will give you an indication to prostate health. Prostate cancer is curable if caught early enough but it does kill over 6000 men a year in the US alone. Don't mess around with it!

I agree with 729, sounds like a prostate problem, maybe prostatitis? I actually have to get mine checked because I've been peeing way more that usual and feel like I have to pee all the time. Also feels really sensitive during anal play.

If your doc doesn't want to look at it, I'd sit in his office til he either refers you to a urologist, or sticks his finger up your ass to check it. I can't understand why he wouldn't examine you. Especially if you are over 40?

my wife often massages my prostate, to keep it healthy, im impotent cause of painmeds. I find the taste somewhat sweet, depending on what i ate i think. She massages it with a finger (or two) or a prostate massager. She makes sure i consume it all, and i kind of like that. Its a funny sensation, you feel contractrions in the groin, spunk comes out, but not the sensation of orgasm. I found i can even leak out seminal fluid when i crap. Went to the doctor and it wasnt a prostateproblem, he said its the way of the body to get rid of seminal fluids. Eg. sort of a wetdream, without the feeling.